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Is there a way to track finger position using a webcam?

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Hi all, Novice with Unity3D and C++ here. Followed the roll-a-ball and space shooter tutorials on the Unity homepage, then did some experimenting on my own with building placement, Sim City-style, and that's about it. Quite experienced with web development languages, particularly PHP, but Unity is a very different kind of beast! Is there a way, using Unity3D or a paid plugin, to use the user's webcam to track their finger position? Basically, I need to get the position and X and Y rotation of the user's finger, and make a graphic follow it around, like a finger puppet. Is this possible? And JUST TO BE CLEAR here, I'm not asking for anyone to write my code for me. I'm asking for clarification on the Unity engine's capabilities. I'm not even entirely certain Unity3D is the correct platform to use -- I'm also looking into Adobe Flash also. So, any clarification on whether or not Unity can accomplish this, and hopefully a point in the right direction to get me started, would be very much appreciated. Thanks!

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